Promissing cerium-doped barium manganate perovskite for solar thermochemical hydrogen production
September 4-8, 2016
Over the past decade, nonstoichiometric oxides have been investigated for solar thermochemical water splitting applications because of their ability to partially reduce and create oxygen vacancies at high temperatures and subsequently reoxidize in steam at lower temperatures, uptaking the oxygen into the lattice and producing hydrogen as a consequence (c.f. Figure 1a).
Cerium oxide is currently viewed as the leading candidate for this process because of its fast reoxidation reaction kinetics and considerable H2 yield. However, high temperatures (>1550oC) are required to drive ceria reduction, making the reactor and the solar heat collector design challenging. Furthermore, a low steam oxidation temperature is preferred from a reactor energy balance stand-point.
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Débora R. Barcellos, Michael Sanders, Jianhua Tong, and Anthony McDaniel, "Promissing cerium-doped barium manganate perovskite for solar thermochemical hydrogen production" in "Nonstoichiometric Compounds VI", ECI Symposium Series, (2016). http://dc.engconfintl.org/nonstoichiometric_vi/47